RISTER

Oil · District 7B · Lease #26649

Operator: ROCO PETROLEUM, INCORPORATED

Cum Oil

6k BBL

Cum Gas

27 MCF

casinghead

Wells

1

Production

1993-01 — 2004-07

Peak Month

1997-11

Production History

Cum Oil: 5,667 BBL Cum Gas: 27 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

263 BBL/mo

Di (annual)

66.6%

b-factor

0.0

EUR

4,724 BBL

R-squared

0.646

type

exponential

Operator History (from monthly production reports)

1993-01 — 2026-07 ROCO PETROLEUM, INCORPORATED 403 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HARKEN EXPLORATION COMPANY35,4001991-10-15